← All apps Twin Paradox Simulator
Education
Watch two twins' worldlines on a spacetime diagram — one straight and inertial, one bent by a turnaround — with each twin's own proper time ticking forward at its own pace as the trip plays out. The traveling twin reliably ages less, and a dedicated explanation panel addresses head-on why this isn't actually a paradox: only the traveling twin's path involves a turnaround, which breaks the naive "it should be symmetric" argument. Adjust travel speed and watch the age gap grow as it approaches the speed of light.
Open Twin Paradox Simulator (twinparadox.apps.vtc.com)
About Twin Paradox Simulator
Twin Paradox Simulator is an interactive learning tool on VTC. Watch two twins' worldlines on a spacetime diagram — one straight and inertial, one bent by a turnaround — with each twin's own proper time ticking forward at its own pace as the trip plays out. The traveling twin reliably ages less, and a dedicated explanation panel addresses head-on why this isn't actually a paradox: only the traveling twin's path involves a turnaround, which breaks the naive "it should be symmetric" argument. Adjust travel speed and watch the age gap grow as it approaches the speed of light. It runs in your web browser and is free to use, and suits students, teachers and self-learners.
Who it's for: Students, teachers and self-learners
Features
- Watch two twins' worldlines on a spacetime diagram
- One straight and inertial, one bent by a turnaround
- With each twin's own proper time ticking forward at its own pace as the trip plays out
- The traveling twin reliably ages less
- Free to use in your browser
Frequently asked questions
What is Twin Paradox Simulator on VTC?
Twin Paradox Simulator is an interactive learning tool on VTC. Watch two twins' worldlines on a spacetime diagram — one straight and inertial, one bent by a turnaround — with each twin's own proper time ticking forward at its own pace as the trip plays out. The traveling twin reliably ages less, and a dedicated explanation panel addresses head-on why this isn't actually a paradox: only the traveling twin's path involves a turnaround, which breaks the naive "it should be symmetric" argument.
Is Twin Paradox Simulator free to use?
Yes. The VTC app catalog lists Twin Paradox Simulator at no cost, and it runs in your web browser with nothing to install.
Who is Twin Paradox Simulator for and how do I start?
It is aimed at students, teachers and self-learners. To start, open https://twinparadox.apps.vtc.com in your browser.